/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.drools.workbench.services.verifier.plugin.client.builders;

import java.util.List;

import org.drools.workbench.models.datamodel.util.PortablePreconditions;
import org.drools.workbench.models.guided.dtable.shared.model.ActionCol52;
import org.drools.workbench.models.guided.dtable.shared.model.BaseColumn;
import org.drools.workbench.models.guided.dtable.shared.model.ConditionCol52;
import org.drools.workbench.models.guided.dtable.shared.model.DTCellValue52;
import org.drools.workbench.models.guided.dtable.shared.model.GuidedDecisionTable52;
import org.drools.workbench.services.verifier.api.client.configuration.AnalyzerConfiguration;
import org.drools.workbench.services.verifier.api.client.index.Action;
import org.drools.workbench.services.verifier.api.client.index.Condition;
import org.drools.workbench.services.verifier.api.client.index.Rule;

public class RuleBuilder {

    private final BuilderFactory builderFactory;
    private final GuidedDecisionTable52 model;
    private final AnalyzerConfiguration configuration;
    private List<DTCellValue52> row;
    private Rule rule;

    public RuleBuilder( final BuilderFactory builderFactory,
                        final GuidedDecisionTable52 model,
                        final AnalyzerConfiguration configuration ) {
        this.builderFactory = PortablePreconditions.checkNotNull( "builderFactory",
                                                                  builderFactory );
        this.model = PortablePreconditions.checkNotNull( "model",
                                                         model );
        this.configuration = PortablePreconditions.checkNotNull( "configuration",
                                                                 configuration );
    }

    public Rule build() throws
                        BuildException {

        resolveColumns();

        return rule;
    }

    private void resolveColumns() throws
                                   BuildException {

        int columnIndex = 0;

        for ( final BaseColumn baseColumn : model.getExpandedColumns() ) {

            if ( baseColumn instanceof ConditionCol52 ) {
                final Condition condition = builderFactory.getConditionBuilder()
                        .with( (ConditionCol52) baseColumn )
                        .with( rule )
                        .with( row )
                        .with( columnIndex )
                        .build();

                rule.getConditions()
                        .add( condition );

            } else if ( baseColumn instanceof ActionCol52 ) {

                final Action action = builderFactory.getActionBuilder()
                        .with( rule )
                        .with( (ActionCol52) baseColumn )
                        .with( row )
                        .with( columnIndex )
                        .build();

                rule.getActions()
                        .add( action );

            }

            columnIndex++;
        }
    }

    public RuleBuilder with( final int rowIndex ) {

        this.row = model.getData()
                .get( rowIndex );
        this.rule = new Rule( rowIndex,
                              configuration );

        return this;
    }
}
